Abstract:
This study began in 1885. The area is naturally regenerated woodland since 1885. Map of 1623 shows the field as arable. Arable crops were also present 1847-78. The field was left fallow 1879-82. Clover was grown 1883-85; last cut 1885. Last cultivated 1883. There are currently no treatments. This was previously an experimental site which had included P treatments. These previous treatments did ... not appear to affect the buildup of organic C & N - see Jenkinson(1971).

Time zero soil measurements were taken. Sampled in 1883 before reversion to woodland. Depths 0-22.9,22.9-45.7,45.7-68.6 cm. Details of soil sampling method: Sampled using metal box 6x6x9 inches (15.2x15.2x22.9 cm) after removing plants and surface litter. 2, 4 or 8 holes were taken on each occasion. 1985 samples taken with semi-cylindrical auger. (A & B samples each of 10 cores, 5 cm diameter, taken on an interleaved transect across the site). Samples taken in 1965 and 1985 were taken from an area (4040 sq m) within the 1.3 ha wilderness which had previously been part of the previous experiment. It is not clear exactly where the earlier samples were taken from. Soil is separated into layers Details of measuring depths and soil layers: 1883,1904,1965: 0-22.9,22.9-45.7,45.7-68.6 cm. 1985: 0-22.9 cm only.

Nearest meteorological station to the site: Rothamsted which is .4 km from the site at coordinates 0deg21min W, 51deg49min N Meteorological data is available from both a manual and an automatic station.

Variables measured are listed in the parameters section of this record.

Description:
This url links to the GCTE-SOMNET home page where additional project information and methodology can be obtained. This site is currently in a datasharing phase of the network where actual data will become available shortly, at different levels of accessibility. Please follow this link for more information.

There are at least 0 replicates in the experiment. Replicate samples from areas previously receiving different P treatments. There are no statistical tests. Assessment of errors was attempted by Jenkinson (1971). Data given by Jenkinson (1971), (1992) are mostly repeat analyses of archived material.